need help with BMP085 software I2C

hello folks,

I am stuck in serious problems compiling a simple test sketch for BMP085 via software I2C.
Spend several days so far to compile this sample:
http://tinyurl.com/pbpyklt
libraries are swI2C_BMP085.h Google Code Archive - Long-term storage for Google Code Project Hosting.
and I2cMaster.h Google Code Archive - Long-term storage for Google Code Project Hosting.
Libraries are installed and available to the arduino IDE by menu 'sketch/ libraries import ...'.

Error is
E:\arduino\libraries\swI2C_BMP085/swI2C_BMP085.cpp:30: undefined reference to `SoftI2cMaster::SoftI2cMaster(unsigned char, unsigned char)'

Can't get the problem solved, any help is great appreciated.
regards
Ralf
P.S.: any other examples are being compiled without errors ....